(3x+18)-(9x-27)=99

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Solution for (3x+18)-(9x-27)=99 equation:


Simplifying
(3x + 18) + -1(9x + -27) = 99

Reorder the terms:
(18 + 3x) + -1(9x + -27) = 99

Remove parenthesis around (18 + 3x)
18 + 3x + -1(9x + -27) = 99

Reorder the terms:
18 + 3x + -1(-27 + 9x) = 99
18 + 3x + (-27 * -1 + 9x * -1) = 99
18 + 3x + (27 + -9x) = 99

Reorder the terms:
18 + 27 + 3x + -9x = 99

Combine like terms: 18 + 27 = 45
45 + 3x + -9x = 99

Combine like terms: 3x + -9x = -6x
45 + -6x = 99

Solving
45 + -6x = 99

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-45' to each side of the equation.
45 + -45 + -6x = 99 + -45

Combine like terms: 45 + -45 = 0
0 + -6x = 99 + -45
-6x = 99 + -45

Combine like terms: 99 + -45 = 54
-6x = 54

Divide each side by '-6'.
x = -9

Simplifying
x = -9

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